Holds fifteen frames of 6x4.5 cm, twelve frames of 6x6 cm or nine frames of 6x7 cm of 120 filmContact prints on 8"x10" paper Exclusive thin backing coupled with high clarity allows you to make quality contact sheets without removing or handling negatives Strong continuous seams prevent negative hang up. Top sheet is 3 mil and bottom sheet is 1.8 mil Archival quality polyethylene - NO PVC - safe for long term storage PAT passed 25 pages per package